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High-Pressure Steam Cycle and Boiler Water Treatment

2010-8-3 · ULTRAMARINESM HP BWT Program • Drew Marine pioneered the "modified phosphate-pH treatment" – Utilizes disodium orthophosphate and caustic so that no "free caustic" is generated in the boiler water – Sodium to phosphate ratio is approximately 2.75:1 and provides margin of safety for good control of the program – Went into effect in the marine industry in the 1960's and has

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Corrosionpedia - What is Acid Phosphate Corrosion

Boilers, which generally use congruent phosphate pH treatment to prevent caustic corrosion, may in turn be subject to acid phosphate corrosion when boiler water is concentrated beneath deposits. This is the result of a localized concentration of phosphate and the high temperature of the metal tube.

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Corrosionpedia - What is Acid Phosphate Corrosion

Boilers, which generally use congruent phosphate pH treatment to prevent caustic corrosion, may in turn be subject to acid phosphate corrosion when boiler water is concentrated beneath deposits. This is the result of a localized concentration of phosphate and the high temperature of the metal tube.

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NAVY BOILER WATER CHEMICAL TESTS AND TREATMENTS

2019-10-24 · NAVY BOILER WATER CHEMICAL TESTS AND TREATMENTS MATERIALS: Automatic zero burets, The tests run on boiler water samples are essentially the same as those run on the make-up feedwater, concentration is the sum of the phosphate ion concentration and the hydrogen phosphate ion concentration. The

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What is the concentration of phosphate which …

What is the concentration of phosphate which injecting in boiler feed water as a descaler? Phosphate(PO4) is basically reacts with mineral dissolved salts in water and percipitates at high

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Boiler water chemistry - Properties of feed water …

The conventional boiler water test finds only the presence of OH and half of CO3. Standard value of P alkalinity in Boiler Water is between 50-300mg CaCO3/l. Effects. Higher value of P alkalinity leads to scale formation and overheating of the inside of the boiler causing internal damage. 6. Chloride ion. It causes generation of scale formation.

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Simultaneous determination of silicate and phosphate …

Finally, the concentration of phosphate is obtained by difference. Silicate and phosphate are determined in boiler water at power plants; 60–120 samples h −1 be analyzed. Determination ranges are 0.05–22 mg l −1 for silicate and 0.1–24 mg l −1 for phosphate. Relative standard deviations for metasilicate and orthophosphate were ≤1

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Simultaneous determination of silicate and phosphate …

Finally, the concentration of phosphate is obtained by difference. Silicate and phosphate are determined in boiler water at power plants; 60–120 samples h −1 be analyzed. Determination ranges are 0.05–22 mg l −1 for silicate and 0.1–24 mg l −1 for phosphate. Relative standard deviations for metasilicate and orthophosphate were ≤1

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BOILER CHEMICAL CLEANING PROCEDURE_

2014-8-24 · Check boiler and temporary system valve condition is ready. 5.2.4. Keeps alkali cleaning time for 8 to 10 hours temperature: 80 – 900 C 5.2.5. The drum level is controlled at the top of level (about + 205 mm). 5.2.6. Concentration of phosphate in boiler water

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Ph And Phosphate Concentration In Bfw And Steam …

Ph And Phosphate Concentration In Bfw And Steam Drum - posted in Industrial Professionals: Boiler feed water (BFW) pH is to be maintained in the range of 8.0 to 9.5(guidelines) where as in steam drum pH maintaining guidelines is in the range of 9.5 to 11.0. Pressure of steam drum is 34 barg. Since dosing of PO4 (Trisodium phosphate is dosing in steam drum) cannot be a controlling media

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Water Research Center - Phosphate in Water

2019-11-6 · Poly forms are used for treating boiler waters and in detergents. In water, they are transformed into orthophosphate and available for plant uptake. Organic phosphates are typically estimated by testing for total phosphate. The organic phosphate is the phosphate that is bound or tied up in plant tissue, waste solids, or other organic material.

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A study of the influence of chloride ion concentration …

The main constituents of the oxidative films in the gas and liquid phases both were Fe3O4., – In order to prevent carbon steel from corroding in boiler water containing Cl− under conditions of low‐phosphate and low‐sodium hydroxide treatment, the concentration of Cl− should be …

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What Is a Boiler Feed Water Treatment System and …

The most appropriate boiler feed water treatment system will help the facility avoid costly plant downtime, expensive maintenance fees, and boiler failure as a result of scaling, corrosion, and fouling of the boiler and downstream equipment. But what is a boiler feed water treatment system and how does it work?

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Water Handbook - Preboiler & Industrial Boiler …

2019-10-27 · Phosphate buffers the boiler water, reducing the chance of large pH changes due to the development of high caustic concentrations. a mechanism for the concentration of boiler water must be present; to protect the ion exchange resin and softener shells. As with any oxygen scavenging reaction, many factors affect the speed of the sulfite

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Phosphate test - Wikipedia

2019-10-11 · Phosphate test. Read in another language Watch this page Edit and the depth of the blue colour indicates the amount of phosphate in the boiler water. The absorbance of the blue solution can be measured with a colorimeter and the concentration of phosphate in the original solution can be calculated. Alternatively, a direct

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Phosphate test - Wikipedia

2019-9-28 · Quantitative method. A quantitative method to determine the amount of phosphate present in samples, such as boiler feedwater, is as follows.A measured amount of boiler water is poured into a mixing tube and ammonium heptamolybdate reagent is added. The tube is …

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[31]. A study of the influence of chloride ion concentration on the corrosion behavior of carbon steel in phosphate high-temperature boiler water chemistries[J], Anti-Corrosion Methods and Materials, Vol.55(2008), . [32].Prediction of the Breakdown Voltage of

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METHODS FOR THE ANALYSIS OF BOILER WATER

2018-5-25 · depends on the P04= ion concentration. A number of reducing agents have been found suitable including Sn, SnCI 2, hydroquinone and 1-2-4 aminonaphthol sulphonic acid. The Sugar Millers Research Institute adapted the use of SnC1 2 for the determination of phosphate in mixed juices and their procedure has been found suitable for boiler waters.

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METHODS FOR THE ANALYSIS OF BOILER WATER

2018-5-25 · depends on the P04= ion concentration. A number of reducing agents have been found suitable including Sn, SnCI 2, hydroquinone and 1-2-4 aminonaphthol sulphonic acid. The Sugar Millers Research Institute adapted the use of SnC1 2 for the determination of phosphate in mixed juices and their procedure has been found suitable for boiler waters.

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What Is a Boiler Feed Water Treatment System and …

The most appropriate boiler feed water treatment system will help the facility avoid costly plant downtime, expensive maintenance fees, and boiler failure as a result of scaling, corrosion, and fouling of the boiler and downstream equipment. But what is a boiler feed water treatment system and how does it work?

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